Question about 1997 GMC Jimmy

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NEED TO REMOVE DASH TO REPLACE HEATER CORE ON 1995 GMC SONOMA

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Yes you have to remove the whole dash assambly to replace the heater core..have fun i had to do mine twice.my new heater core lasted about 6 months.

Posted on Mar 30, 2009

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What procedure is necessary for removal and replacement of a heater core in a 96/97 gmc jimmy

Posted on Oct 05, 2008

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SOURCE: 1995 gmc sonoma heater core

About the heater core, in the manuel I bought at Auto zone, it gives all the steps and bolts necessary to unloose. The dash will swing out at the bottom, don't forget to remove the bolts under the speaker covers.
R/ Randy

Posted on Apr 20, 2011

dnewcombe1
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SOURCE: Replacing heater core in 2000 GMC sonoma. Dash is

If the dash is removed you've saved about 9 10ths of the job endurance. Look around, what you believe to be, the perimeter of the heater box. I cannot, and no one else can, tell you exactly where the bolts and nuts that mount the heater box are. Therefore you must viually sixe the box and check outide in the engine compartment and inside under the dash for the mounting bolts.You'll want to start by removing the heater hoses. Then starting at the passenger side engine compartment look for a group of 10mm or 7/16ths nuts retaining the housing and remove them. Do the same inside. The housing is usually held together with screws or clips, it changes year to year. Keep a log or pix of the wires and cables and hoses(vacuum) that are connected to the housing for reassembly. You'll need to "roll" the box out from under the dash depending on how much of the dash has been removed. The core is easy to spot for is has two hoses sticking out, and, is encircled with clips or screws . Also make sure you remove the bracket around the two entry hoses if it has one. Thank you, Dana

Posted on Oct 04, 2009

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1995 gmc sonoma heater core removal, replacement. i need help removing the DASH.


About the heater core, in the manuel I bought at Auto zone, it gives all the steps and bolts necessary to unloose. The dash will swing out at the bottom, don't forget to remove the bolts under the speaker covers.
R/ Randy

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NOT FUN. this is a minimum of a 2 hour job up to 6 hours depending on skills. the entire dash has to be removed from the truck. the heater core itself is located just of center of the fire wall towards the passenger. A LOT of hardware will have to be taken out and kept track of properly or you will have problems getting it all reinstalled correctly

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Usually the whole hvac box has to come out of the vehicle to replace the heater core. Once the box is out it can be opened and the heater core removed. Be careful with all the vent doors and actuators, make note of how everything came apart. The last thing you want to do is have to remove the dash and box because something wasn't on just right. Good luck.

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